20828860

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{80111}}^1$

素因数の和:80133

約数の個数: 24

約数和(自身を含む): 47105856

約数和(自身を除く): 26276996

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 80111, 160222, 320444, 400555, 801110, 1041443, 1602220, 2082886, 4165772, 5207215, 10414430, 20828860]

約数ペア:

[(1, 20828860), (2, 10414430), (4, 5207215), (5, 4165772), (10, 2082886), (13, 1602220), (20, 1041443), (26, 801110), (52, 400555), (65, 320444), (130, 160222), (260, 80111)]